Management of Astigmatism in Lens Surgery

This course will prepare the general ophthalmologist to manage astigmatism associated with lens surgery.



The continuous progress in lens surgery offers us more and better options to achieve postoperative emmetropia. Some of the most recent advances are specifically aimed at reducing residual astigmatism, which requires a thorough understanding of optical principles and different preoperative evaluation methods and surgical techniques. No less important are the criteria to prevent and manage trans and postoperative complications.


Intended for: ophthalmologists, ophthalmologists in training and, optometrists (from countries where optometry is recognized)

Format: Online and self-paced with lifetime access

Duration: Approximately 2-3 hours a week for 8 weeks (depending on previous knowledge)

Certificate: 15 hours of PAAO Continuing Medical Education on completion


At the end of the course the participants will be able to:

  • Explain the optical and anatomical bases of astigmatism.
  • Efficiently request and interpret the necessary complementary tests in each case, both pre-and postoperatively.
  • Indicate the appropriate surgical technique for each case
  • Perform the calculation of the power and meridian of implantation of toric lenses
  • Evaluate refractive results in Cataract surgery
  • Indicate the appropriate corrective in case of residual astigmatism
  • Refractive corneal surgery
  • Rotation or change of toric lens


  • Study guides that facilitate the student’s learning process.
  • Audiovisual lectures prepared by the teaching team on each topic. These will be available for online reading and in a save/print version.
  • Reading material, available in Spanish and/or English in pdf format.
  • Concept maps, synoptic charts, tables, and memory aids 


Application activities are used throughout the course consisting of:

  • Multiple-choice questions
  • Open-ended, self-corrected questions with checklists
  • Question and answer forums

Each module will have a final exam that must be passed to move on to the next module. The number of attempts is unlimited, but must be passed to move on to the next module.

The activities will promote the exchange and use of students’ knowledge and experiences and facilitate applying new learning to professional practice.

The teachers in charge of the course will accompany, guide, and encourage the learning process in the individual instances and the collective learning interactions.



  • Incidence of astigmatism. Impact on the patient’s vision and evolution with age
  • How to measure astigmatism to plan cataract surgery
  • Indications for surgical correction of astigmatism in cataract surgery

Incisions and Astigmatism

  • Induction of astigmatism by incision
  • Relaxing non-perforating incisions with Femto Laser

Toric Lenses

  • Toric lenses: principles

Toric Lens Calculation

  • Universal formulas and calculators
  • Astigmatism of the posterior face of the cornea

New technologies and calculation in ectasias

  • New technologies for calculation. Verion and ORA
  • Cataract and corneal ectasias (strategy, calculation, and type of lenses)

Surgical Technique

  • Preoperative complications (irregular astigmatism)
  • Toric Lens Implant

 Postoperative Complications

  • Postoperative complications. Management of residual astigmatism
  • Rotation effect of Toric Intraocular Lens

Meet Your Faculty

Over 18 distinguished experts contributed to this course Learn more about them.

PAAO Member

$100 USD

$120 USD non-member

life-time access
forum support
printable study materials

PAAO Member

$150 USD

$200 USD non-member

life-time access
forum support
printable study materials


$150 USD

USD non-member

life-time access
forum support
printable study materials

*Residents/fellows must submit a letter from their program.
**Technicians must submit a letter from an ophthalmologist.

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